describe("#isUser", function () {

it ("should return true if the argument is a user object, false otherwise", function () {

expect(isUser({ "name":"Semmy Purewal", "screen_name":"semmypurewal" })).toBe(true);

expect(isUser({ "name":"Firstname Lastname", "screen_name":"user" })).toBe(true);

expect(isUser("semmypurewal")).toBe(false);

expect(isUser({ "age": 37, "name":"Semmy Purewal", "screen_name":"semmypurewal" })).toBe(false);

});

});

describe("#userToDiv", function () {

it ("should convert a user object into an HTML div", function () {

var user = { "name":"Semmy Purewal", "screen_name":"semmypurewal" };

expect(userToDiv(user)).toEqual("<div><h1>Semmy Purewal</h1><h2>semmypurewal</h2></div>");

var obama = { "name":"Barack Obama", "screen_name":"BarackObama"};

expect(userToDiv(obama)).toEqual("<div><h1>Barack Obama</h1><h2>BarackObama</h2></div>");

});

it ("should throw an error if the argument is not a user object", function () {

expect(function () {

userToDiv({});

}).toThrow();

expect(function () {

userToDiv({ "name":"failing test", "screen_name":"failingtest", "age": 50 });

}).toThrow();

});

});

describe("#userWithTweetsToDiv", function () {

it ("should convert a user object with tweets into an HTML string", function () {

var example = {

"name": "Semmy Purewal",

"screen_name":"semmypurewal",

"tweets": [

"this is a tweet.",

"this is another tweet!"

]

};

expect(userWithTweetsToDiv(example)).

toEqual("<div><h1>Semmy Purewal</h1><h2>semmypurewal</h2><ul><li>this is a tweet.</li><li>this is another tweet!</li></ul></div>");

});

});

describe("#frequencies", function () {

it ("should return an object that contains the frequencies of each word in the array", function () {

expect(frequencies([ "hello", "world", "hello", "goodbye", "hello", "world", "thing" ]))

.toEqual({ "hello" : 3, "world" : 2, "goodbye": 1, "thing" : 1 });

expect(frequencies([])).toEqual({});

expect(frequencies([ "hello", "world" ])).toEqual({ "hello" : 1, "world" : 1 });

});

});